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    <title>Challenge--One</title>
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　　  <center><p>小试牛刀</p></center>
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              <!-- 1 -->

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                <i class="weixin massive icon"></i>
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            <div class="column">
              <div class="ui vertical inverted green center aligned segment">
                <i class="game massive icon"></i>
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            </div>
          </div>
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        <div class="column">
          <div class="ui vertical inverted orange center aligned segment">
            <i class="users massive icon"></i>
          </div>
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        <div class="column">
          <div class="ui vertical inverted blue center aligned segment">
            <i class="cloud massive icon"></i>
          </div>
        </div>

                <!-- 2 -->

        <div class="column">
          <div class="ui two column grid">
            <div class="column">
              <div class="ui vertical inverted purple center aligned segment">
                <i class="map outline massive icon"></i>
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              <div class="ui vertical inverted blue center aligned segment">
                <i class="github massive icon"></i>
              </div>
            </div>
          </div>
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        <div class="column">
          <div class="ui vertical inverted red center aligned segment">
            <i class="file image outline massive icon"> </i>
          </div>
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        <div class="column">
          <div class="ui vertical inverted green center aligned segment">
            <i class="calendar outline massive icon"></i>
          </div>
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          <!-- 3 -->

        <div class="column">
            <div class="ui vertical inverted green center aligned segment">
              <i class="mail massive icon"></i>
            </div>
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        <div class="column">
            <div class="ui vertical inverted purple center aligned segment">
              <i class="sound massive icon"></i>
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        <div class="column">
          <div class="ui two column grid">
            <div class="column">
              <div class="ui vertical inverted orange center aligned segment">
                <i class="toggle right massive icon"></i>
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            </div>
            <div class="column">
              <div class="ui vertical inverted blue center aligned segment">
                <i class="cloud massive icon"></i>
              </div>
            </div>
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        <div class="column">
          <div class="ui vertical inverted black segmnet">
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　　  <center><p>By--SKYNE</p></center>
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